To explore Taiwan's stocking technology

In recent years, the breeding industry has developed rapidly. Taiwan's larvae have been introduced to the mainland in large numbers. Many farmers have not meticulously and scientifically manipulated their stocking. As a result, they have induced various diseases and caused low survival rates. The author summarizes several years of practical experience for reference by peers. 1 Preparation before stocking 1.1 Equipment overhaul: Check whether the systems such as water injection, drainage, power supply, aeration, heat preservation, etc. can operate normally and should not be repaired after stocking. This will affect the normal growth of the nursery stock. 1.2 Qingchi Disinfection: Completely remove the debris inside and outside the pool, do a good job of indoor and outdoor environmental sanitation, the old sand in the pool is repeatedly rubbed several times, let the sunlight exposure, make it white, use 300-500ppm quicklime or 30-50ppm bleach to disinfect and disinfect Sterilization. The drying table, food table, pool wall, pool bottom, and sewage outlet should all be smooth. Finally, the doors and windows should be closed to evaporate the formaldehyde solution to sterilize the air for 48 hours. Then open the doors and windows to eliminate residual formaldehyde vapor. 1.3 Water injection thermostat: Select 1 pool as a reservoir, cover with double layer plastic film in winter, and use a thermostat pool for two pools. 80ppm quicklime was used to disinfect the body of water, and then 0.18ppm of strong insecticide was used to kill zooplankton in the water body. The beneficial algae were cultivated. The transparency was 25cm, the PH value was 7.5, and the temperature was gradually increased when the season was adjusted to the appropriate water temperature to inject into the pool to be stocked. Up to 30°C, when the water temperature is below 25°C, it rises by 2°C every day, when it is above 25°C, it only rises by 1°C per day, the depth of water is 20cm when juveniles are stocked, 30cm after one month, 40cm after two months , 60cm three months later, until the pool is 60cm. 1.4 The food stand and drying platform are placed well, and the poisonous water hyacinth is placed around the food table. Blocked with a rope, the area starts to be 1/6, the total area in the later period should not exceed 1/3, and the old decayed Root leaves clear. 1.5 Detoxification drugs, juvenile feed, etc. are ready, and a production management system and a post responsibility system for workers are established. 2 Childcare stocking 2.1 Selection: Taiwanese juveniles are transported by sea and by air to the coasts of Fujian and Fujian. Because of their large quantities and low prices, they grow faster than local Chinese sturgeons, and some farmers have good breeding results. The commodity is relatively thin and sells well. Therefore, many field owners want to raise Taiwan's embarrassment, but it is weak in disease resistance and has a high mortality rate. It must be carefully fed. First of all, we must focus on the stocking clearance. When we look at the samples at the point of sale or transportation to the market, it is generally a batch of seedlings to randomly sample a few boxes. Each box has two floors. Each bag has 500 or 600 juveniles and should be poured separately. In plastic basins filled with clear water, one by one careful observation, the injured, disabled, sick and dehydrated severely poor seedlings as much as possible to choose out, generally if the proportion is below 3%, a weight of 3.5 grams or more, specifications are neat, activities Strong ability, with the back of the hand can be powerfully retracted, complete and shiny body surface, back, abdomen and limbs without any white spots or white spots on the armpits, but also just arrived, the price is right, can be, such as the ratio of seedlings in the poor Between 3% and 5%, other conditions are good, but you can also, if poor seedlings are above 5%, don't be better. If there are many quantities, it is best to take several batches and look at several batches of samples, and make a careful decision, so as to avoid unnecessary economic losses and a higher insurance factor. 2.2 Carcass processing method: Due to the long-distance transport of the long-distance dry method, there is a lot of excrement, so first rinse the carcass surface with the pool water, let it adapt to the water environment, if the dehydration is serious, can use glucose water soak for 1-2 hours , and then 1% concentration of gentian violet syrup sprayed onto the carcass, after 5 minutes to dry, can be stocked. This disinfection method has the function of protecting the skin and killing the bacteria and fungi on the body surface. It has a short time, low price, and little stimulation. 2.3 Restocking: The density is 60 pcs/m2. When stocking, use a gloved hand or a hand that cuts the fingernails to gently pick up the larvae and put them on the food table so that they can climb into the water on their own. The net 0.5ppm (instead of malachite green) to prevent watery mildew and white spot disease, the drug and powerful insecticide are both produced by Chengdu New Fish Factory. For Chinese and Western medicine compound fish medicine. 2.4 In time to eat: Add 10% of fresh brew or egg yolk and 1% blue alga extract (spiral algae) into the feed slurry. Sprinkle a small amount in the water around the food table and make the rest of the dough soft. Insert the nails on the table and allow half of them to be in the water and half to be on the water to lure the food and then gradually transition to the water to eat. 2.5 disease, injury, residual, poor seedlings into the disease isolation pond single-culture. 3 Precautions 3.1 It is forbidden to smoke in the greenhouse and personnel who enter the greenhouse. 3.2 When spilling drugs, it should be uniform, and the chemicals spilled on water hyacinth should be flushed with water into the body of water. 3.3 The staff is relatively fixed, change shoes, change clothing in the greenhouse, and make a work record.

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